PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/15-12:42:50
G01     61.0           30.4                5.6 +/-    1.24       9.7 +/-    1.24  0.040 / 0.030
G07     140.8          21.4                5.2 +/-    2.50      11.0 +/-    2.50  0.040 / 0.040
G11     49.1           26.2                4.3 +/-    2.56       8.1 +/-    2.56  0.110 / 0.120
G13     263.5          36.8                6.5 +/-    2.21      10.0 +/-    2.21  0.080 / 0.110
G15     296.1          15.9                4.2 +/-    1.82      10.1 +/-    1.82  0.030 / 0.030
G17     244.9          71.5                6.4 +/-    0.68       6.7 +/-    0.68  0.030 / 0.030
G18     42.8           13.6                3.8 +/-    2.36       9.7 +/-    2.36  0.120 / 0.090
G19     229.9          50.7                5.4 +/-    3.09       6.7 +/-    3.09  0.060 / 0.120
G28     20.5           60.0                6.8 +/-    1.13       7.7 +/-    1.13  0.120 / 0.380
G30     142.5          54.5                7.3 +/-    0.81       8.7 +/-    0.81  0.110 / 0.260